Failure to redirect Quadro 4000 on Dell T7600

Hello all,

I have a Dell Precision T7600 and am evaluating Parallels Workstation Extreme. I am unable to redirect a Quadro 4000 card to the virtual machine. My primary video card is a Quadro NVS 295, and there is currently no display connected to the 4000 (I'm intending to use it as a GPGPU in a Linux virtual machine running simulation software).

It seems that the VT-d hook driver never installs, and when I try to install it manually, I receive the error that "The driver selected for this device does not support this version of Windows."

I submitted another forum post with a setupapi.log attached, but it disappeared :-(

Does anyone have any help for this problem? I really need to make sure this software will work before I purchase it.